نتایج جستجو برای: aged forest

تعداد نتایج: 301189  

2005
J. OGDEN

Information on diameter frequency distributions and spatial patterns, together with estimates of diameter growth and mortality, are used to draw up regeneration balance sheets for three stands of red beech (Nothofagus fusca) on Mount Colenso, New Zealand. Because large canopy gaps are a feature of these forests, attention is directed particularly to their future status. It is concluded that, in...

Journal: :Journal of environmental management 2013
Rasoul Yousefpour Christian Temperli Harald Bugmann Che Elkin Marc Hanewinkel Henrik Meilby Jette Bredahl Jacobsen Bo Jellesmark Thorsen

We study climate uncertainty and how managers' beliefs about climate change develop and influence their decisions. We develop an approach for updating knowledge and beliefs based on the observation of forest and climate variables and illustrate its application for the adaptive management of an even-aged Norway spruce (Picea abies L. Karst) forest in the Black Forest, Germany. We simulated fores...

2015
Morag F. Macpherson Adam Kleczkowski John Healey Nick Hanley

E ective forest management is crucial to maximising the economic bene ts obtained from forests. However, the arrival of novel pests and pathogens may have a negative e ect on timber values. We argue that management strategies should be calibrated to consider the e ect of disease and in this paper explore the optimal rotation length of a single rotation, even-aged, plantation forest under varyin...

2014
Hans Pretzsch Peter Biber Gerhard Schütze Enno Uhl Thomas Rötzer

Forest ecosystems have been exposed to climate change for more than 100 years, whereas the consequences on forest growth remain elusive. Based on the oldest existing experimental forest plots in Central Europe, we show that, currently, the dominant tree species Norway spruce and European beech exhibit significantly faster tree growth (+32 to 77%), stand volume growth (+10 to 30%) and standing s...

2004
DEBORAH K. KENNARD

Stand structure, species richness and population structures of tree species were characterized in 12 stands representing 50 y of succession following slash-and-burn agriculture in a tropical dry forest in lowland Bolivia. Estimates of tree species richness, canopy cover and basal area reached or surpassed 75% of mature forest levels in the 5-, 8-, and 23-y-old stands respectively. Total stem de...

2015
Ola Sallnäs Ambros Berger Minna Räty Rodney J. Keenan Eric J. Jokela

In this paper a new concept for modeling uneven-aged forests (UEAF) is presented. The term UEAF in this article encloses all forests that deviate from the even-aged structure. The matrix model is area-based, in that the forest under study is described by a distribution of areas over fixed state-spaces spanned by stem number and volume per hectare classes. Dynamics is introduced as transitions o...

2000
Thomas B. Lynch Lawrence R. Gering Michael M. Huebschmann

A survival model for shortleaf pine (Pinus echinata Mill.) trees growing in uneven-aged stands was developed using data from permanently established plots maintained by an industrial forestry company in western Arkansas. Parameters were fitted to a logistic regression model with a Bernoulli dependent variable in which ‘1” represented individual tree survival and “0” represented individual tree ...

2016
Xinyun Xie Jun Cui Wentao Shi Xijun Liu Xiao Tao Qin Wang Xiaoniu Xu

The quantification of biomass carbon pools is important for understanding carbon cycling in forest ecosystems. This study was designed to reveal the effects of stand age on biomass partitioning and carbon storage of Chinese fir plantation stands in Dabie Mountains of Anhui, East China. A total of six even-aged Chinese fir plantation stands along an age-sequence from 10 to 50 years were selected...

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